Compact coating and rolling device for pole piece and control method thereof, pole piece and battery

Abstract

The present disclosure provides a compact coating and rolling device for pole piece, a control method thereof, a pole piece and a battery. The compact coating and rolling device for pole piece comprises a rack and a unwinding mechanism, a first conveying roller group, a cutter die mechanism and a second conveying roller group arranged on the rack respectively. The compact coating and rolling device further comprises an intermediate coating tension adjusting mechanism and a main coating and rolling mechanism arranged on the rack respectively. The first conveying roller group, the intermediate coating tension adjusting mechanism and the second conveying roller group are arranged in sequence along the vertical direction of the rack. The device not only realizes coating of the pole piece, but also realizes rolling of the pole piece, that is, the device integrates coating and rolling functions. In addition, the first conveying roller group, the intermediate coating tension adjusting mechanism and the second conveying roller group are arranged in sequence along the vertical direction of the rack, and the unwinding mechanism and the main coating and rolling mechanism are located on the same side of the first conveying roller group, so that the overall structure of the device is relatively compact, and the space occupied by the device as a whole is relatively small.

Description

Technical Field

[0001] This disclosure relates to the technical field of new energy, and in particular to a compact coating roll forming equipment for electrodes and its control method, electrodes and batteries. Background Technology

[0002] The electrode sheet needs to go through coating and rolling processes in sequence during the manufacturing process, that is, it is processed by coating machines and rolling machines arranged in a linear manner.

[0003] However, existing coating machines, such as patent document CN223811202U, disclose details of coating electrode sheets, but the coated electrode sheets need to be wound up and unloaded before being transported to another machine, namely a roller press, for unwinding-rolling-winding operations.

[0004] Similarly, patent document CN112604911A discloses a coating machine that involves details such as coating and drying of electrode sheets. The coating process involves transferring the electrode sheets to a roller press for rolling after coating.

[0005] Therefore, after completing the electrode coating process, the aforementioned coating machines must be rolled up and transferred to a roller press for rolling. Since the coating machine and the roller press are two separate pieces of equipment, the overall space occupied is large, which is particularly unfavorable for R&D experimental bases with limited space. Summary of the Invention

[0006] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a compact coating roll forming equipment for electrodes with a small overall footprint, a control method thereof, electrodes, and batteries.

[0007] The purpose of this disclosure is achieved through the following technical solution: A compact coating roll forming machine for electrodes includes a frame and an unwinding mechanism, a first conveyor roller group, a die-cutting mechanism, and a second conveyor roller group, all respectively disposed on the frame. The compact coating roll forming machine also includes an inter-coating tension adjustment mechanism and a main coating roll forming mechanism, both disposed on the frame. The first conveyor roller group, the inter-coating tension adjustment mechanism, and the second conveyor roller group are arranged sequentially along the vertical direction of the frame. The unwinding mechanism and the main coating roll forming mechanism are located on the same side of the first conveyor roller group. The main coating roller of the main coating roll forming mechanism is disposed adjacent to the back roller of the inter-coating tension adjustment mechanism, and the roller cutter assembly of the die-cutting mechanism is disposed adjacent to the main coating roller of the main coating roll forming mechanism. When the equipment is in the coating state, the electrode unwound by the unwinding mechanism passes sequentially through the first conveying roller group, the tension roller group of the inter-coating tensioning mechanism, the back roller and the second conveying roller group. The main coating roller abuts against the side of the electrode away from the back roller. The roller cutter assembly scrapes the main coating roller. There is a first gap between the moving roller of the main coating roller pressing mechanism and the main coating roller. When the equipment is in the rolling state, the electrode sheet unwound by the unwinding mechanism passes sequentially through the first conveying roller group, the tension roller group of the inter-coating tensioning mechanism, the main coating roller and the second conveying roller group. There is a second gap between the back roller and the main coating roller, and there is a third gap between the roller cutter assembly and the main coating roller. The moving roller presses the side of the electrode sheet away from the main coating roller.

[0008] In one embodiment, the main coating roller pressing mechanism is located above the unwinding mechanism.

[0009] In one embodiment, the main coating roller pressing mechanism includes a main coating roller, a coating assembly, a receiving hopper, and a roller pressing assembly; The main coating roll is rotatably connected to the frame; The coating assembly is mounted on the frame. The drive end of the coating assembly is used to drive the coating die head of the coating assembly to move towards or away from the main coating roller. When the equipment is in the coating state, the drive end of the coating assembly is used to drive the coating die head of the coating assembly towards the main coating roller, so that the coating die head of the coating assembly abuts against the main coating roller. When the equipment is in the rolling state, the drive end of the coating assembly is also used to drive the coating die head of the coating assembly away from the main coating roller. The receiving hopper is mounted on the frame, and the receiving port of the receiving hopper is located below the position where the coating die head of the coating assembly acts on the main coating roller. The rolling assembly is mounted on the frame, and the movable roller of the rolling assembly is used to roll the electrode sheet on the side away from the main coating roller when the equipment is in the rolling state.

[0010] In one embodiment, the rolling assembly includes a rolling drive, a telescopic rod seat, and a movable roller. The rolling telescopic drive is fixed to the frame, and its power output end is connected to one end of the telescopic rod seat. The movable roller is rotatably connected to the other end of the telescopic rod seat; and / or, The roll forming assembly is located below the main coating roll.

[0011] In one embodiment, the roller cutter assembly is located above the main coating roll.

[0012] In one embodiment, the compact coating roll forming equipment further includes a receiving mechanism, which is disposed on the frame and adjacent to the first conveyor roller group. The receiving mechanism is used to connect the new electrode sheet to the old electrode sheet when the unwinding mechanism switches to unwind the electrode sheet.

[0013] In one embodiment, the inter-coating tension adjustment mechanism includes a first adjusting drive, a tension roller assembly, a second adjusting drive, a coating wheel frame, and a back roller. The first adjusting drive is fixed to the frame. The tension roller assembly includes a pulley frame and a plurality of tension rollers. The pulley frame is slidably connected to the frame and fixedly connected to the power output end of the first adjusting drive. The plurality of tension rollers are spaced apart and rotatably arranged on the pulley frame. The second adjusting drive is mounted on the pulley frame. The coating wheel frame is slidably connected to the pulley frame and fixedly connected to the power output end of the second adjusting drive. The back roller is rotatably connected to the coating wheel frame; and / or, The first conveyor roller group includes a first conveyor wheel, an adjusting roller, and a second conveyor wheel arranged sequentially along the electrode conveying direction. The first conveyor wheel and the second conveyor wheel are rotatably connected to the frame. The adjusting roller is used to move relative to the first conveyor wheel and the second conveyor wheel respectively when adjusting the electrode tension.

[0014] A control method for a compact coating roll forming machine for electrode sheets, used to control the compact coating roll forming machine described in any of the above embodiments, the control method comprising: Obtain instruction information for the working mode, including coating instruction information or rolling instruction information; Determine whether the instruction information is a coating instruction information; if so, the adjustment drive end of the inter-coating tension adjustment mechanism drives the back roller to move to a position where it abuts against the electrode sheet away from the main coating roller, so that the back roller abuts against the main coating roller; the roller cutter assembly drive end of the die-cutting mechanism drives the roller cutter assembly to move to a position where it abuts against the main coating roller, so that the roller cutter assembly abuts against the main coating roller; the roller pressing drive end of the main coating roller pressing mechanism drives the moving roller to move to a position where there is the first gap with the main coating roller. Otherwise, the adjusting drive end of the inter-coating tensioning mechanism drives the back roller to move to a position where there is a second gap with the main coating roller, the roller cutter assembly drive end of the die-cutting mechanism drives the roller cutter assembly to move to a position where there is a third gap with the main coating roller, and the roller pressing drive end of the main coating pressing mechanism drives the moving roller to move to a position where it abuts against the electrode sheet away from the main coating roller.

[0015] An electrode sheet is prepared using the compact coating roll forming equipment for electrode sheets described in any of the above embodiments.

[0016] A battery comprising the aforementioned electrodes.

[0017] Compared with the prior art, this disclosure has at least the following advantages: 1) In the above-mentioned compact coating roll forming equipment for electrode sheets, when the equipment is in the coating state, the electrode sheets unwound by the unwinding mechanism pass sequentially through the first conveyor roller group, the tension roller group of the inter-coating tension adjustment mechanism, the back roller, and the second conveyor roller group. The main coating roller abuts against the side of the electrode sheet away from the back roller, and the roller cutter assembly scrapes the main coating roller. At this time, there is a first gap between the moving roller of the main coating roll forming mechanism and the main coating roller. When the equipment is in the roll forming state, the electrode sheets unwound by the unwinding mechanism pass sequentially through the first conveyor roller group, the tension roller group of the inter-coating tension adjustment mechanism, the main coating roller, and the second conveyor roller group. There is a second gap between the back roller and the main coating roller, and a third gap between the roller cutter assembly and the main coating roller. The moving roller rolls against the side of the electrode sheet away from the main coating roller, so that the moving roller and the main coating roller jointly roll the electrode sheet. 2) The above-mentioned compact coating roll forming equipment not only achieves coating of the electrode sheet, but also roll forming of the electrode sheet. That is, the equipment integrates coating and roll forming functions into one. In addition, the first conveyor roller group, the inter-coating tensioning mechanism and the second conveyor roller group are arranged in sequence along the vertical direction of the frame. The unwinding mechanism and the main coating roll forming mechanism are located on the same side of the first conveyor roller group, making the overall structure of the equipment more compact and the overall space occupied by the equipment smaller. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a compact coating roll forming apparatus for electrode sheets according to one embodiment; Figure 2 for Figure 1 A partial structural schematic diagram of a compact coating roll forming equipment for the electrode shown. Figure 3 for Figure 2 A partial enlarged view of the compact coating roller press shown; Figure 4 for Figure 1 A cross-sectional view of the coating state of a compact coating roller press for the electrode shown; Figure 5 for Figure 1 A cross-sectional view of the compact coating roll forming equipment for the electrode shown, in the roll forming state; Figure 6A flowchart illustrating the steps of a control method for a compact coating roll forming apparatus for electrodes, according to one embodiment; Figure 7 This is a partial digital model schematic diagram of a compact coating roll forming apparatus for electrode sheets according to one embodiment; 10. Compact coating roller press; 100. Frame; 200. Unwinding mechanism; 210. Unwinding assembly; 212. Air-expanding shrink roller; 213. First guide roller; 214. Second guide roller; 220. Adjusting seat assembly; 222. Cylinder correction drive; 224. Mounting seat; 230. Correction sensor; 300. First conveyor roller group; 310. First conveyor wheel; 320. Adjusting roller; 321. Swing drive; 322. Swing rod; 323. Adjusting wheel; 330. Second conveyor wheel; 400. Die-cutting mechanism; 410. Roller cutter assembly; 412. Roller cutter; 414. Lifting assembly; 4142. Lifting drive; 4144. Lifting slide; 500. Second conveyor roller group; 600. Inter-coating tension adjustment mechanism; 610. First adjustment drive; 611. 613. Motor; 614. First lead screw; 615. First nut; 620. Tension roller assembly; 622. Pulley frame; 623. Tension roller; 6232. First tension roller; 6233. Second tension roller; 630. Second adjusting drive component; 631. Second motor; 632. Second lead screw; 633. Second nut; 640. Coating roller frame; 650. Back roller; 700. Main coating roller pressing mechanism; 710. Main coating roller; 720. Coating component; 722. Coating die head; 730. Receiving hopper; 740. Roll pressing assembly; 741. Roll pressing drive component; 743. Telescopic rod seat; 745. Moving roller; 800. Receiving mechanism; 810. Connecting material rack; 820. Pressing clamp assembly; 821. Pressing plate; 822. Pressing drive cylinder; 823. Silicone pressing component. Detailed Implementation

[0020] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments: like Figures 1 to 4 As shown, a compact coating roll pressing device 10 for electrode 20 in one embodiment includes a frame 100 and an unwinding mechanism 200, a first conveyor roller group 300, a die-cutting mechanism 400, a second conveyor roller group 500, an inter-coating tensioning mechanism 600, and a main coating roll pressing mechanism 700 respectively disposed on the frame 100.

[0024] In one embodiment, the first conveyor roller group 300, the inter-coating tension adjustment mechanism 600, and the second conveyor roller group 500 are arranged sequentially along the vertical direction of the frame 100. Specifically, the first conveyor roller group 300, the inter-coating tension adjustment mechanism 600, and the second conveyor roller group 500 are arranged sequentially from bottom to top along the vertical direction of the frame 100 (i.e., parallel to the Z-axis direction). Further, the unwinding mechanism 200 and the main coating roller pressing mechanism 700 are located on the same side of the first conveyor roller group 300, the main coating roller 710 of the main coating roller pressing mechanism 700 is arranged adjacent to the back roller 650 of the inter-coating tension adjustment mechanism 600, and the roller cutter assembly 410 of the die-cutting mechanism 400 is arranged adjacent to the main coating roller 710 of the main coating roller pressing mechanism 700. Specifically, the discharge end of the unwinding mechanism 200 is located adjacent to the inlet end of the first conveyor roller group 300. The electrode sheet is unwound from the discharge end of the unwinding mechanism 200 to the inlet end of the first conveyor roller group 300 for feeding. The moving roller 745 of the main coating roller pressing mechanism 700 is located below the main coating roller 710, the roller cutter assembly 410 is located above the main coating roller 710, the back roller is located on one side of the main coating roller 710, and the coating die head 722 of the main coating roller pressing mechanism 700 is located on the other side of the main coating roller 710 relative to the back roller 650.

[0025] like Figure 4As shown, when the equipment is in the coating state, the electrode unwound by the unwinding mechanism 200 passes sequentially through the first conveyor roller group 300, the tension roller group 620 of the inter-coating tension adjustment mechanism 600, the back roller 650, and the second conveyor roller group 500. The main coating roller 710 abuts against the side of the electrode away from the back roller 650. The roller cutter assembly 410 scrapes the main coating roller 710. There is a first gap between the moving roller 745 of the main coating roller pressing mechanism 700 and the main coating roller 710.

[0026] like Figure 5 As shown, when the equipment is in the rolling state, the electrode sheet unwound by the unwinding mechanism 200 passes sequentially through the first conveyor roller group 300, the tension roller group 620 of the inter-coating tension adjustment mechanism 600, the main coating roller 710, and the second conveyor roller group 500. There is a second gap between the back roller 650 and the main coating roller 710, and there is a third gap between the roller cutter assembly 410 and the main coating roller 710. The moving roller 745 rolls the electrode sheet on the side away from the main coating roller 710.

[0027] In the aforementioned compact coating roller pressing equipment 10 for electrode sheets, when the equipment is in the coating state, the electrode sheets unwound by the unwinding mechanism 200 pass sequentially through the first conveying roller group 300, the tension roller group 620 of the inter-coating tension adjustment mechanism 600, the back roller 650, and the second conveying roller group 500. The main coating roller 710 abuts against the side of the electrode sheet away from the back roller 650, and the roller cutter assembly 410 scrapes the main coating roller 710. At this time, there is a first gap between the moving roller 745 of the main coating roller pressing mechanism 700 and the main coating roller 710. When the equipment is in the rolling state, the electrode sheet unwound by the unwinding mechanism 200 passes sequentially through the first conveyor roller group 300, the tension roller group 620 of the inter-coating tension adjustment mechanism 600, the main coating roller 710 and the second conveyor roller group 500. There is a second gap between the back roller 650 and the main coating roller 710, and there is a third gap between the roller cutter assembly 410 and the main coating roller 710. The moving roller 745 rolls on the side of the electrode sheet away from the main coating roller 710, so that the moving roller 745 and the main coating roller 710 jointly roll the electrode sheet. The aforementioned compact coating and rolling equipment 10 not only coats the electrode sheets but also rolls them, meaning the equipment integrates coating and rolling functions. Furthermore, the first conveyor roller group 300, the inter-coating tension adjustment mechanism 600, and the second conveyor roller group 500 are arranged sequentially along the vertical direction of the frame 100. The unwinding mechanism 200 and the main coating and rolling mechanism 700 are located on the same side of the first conveyor roller group 300, making the overall structure of the equipment more compact and reducing the space occupied by the equipment.

[0028] It should be noted that the structure and working mechanism of the coating die head 722 are existing technologies and will not be elaborated on here.

[0029] like Figure 2 and Figure 3 As shown, in one embodiment, the inter-coating tension adjustment mechanism 600 includes a first adjustment drive 610, a tension roller assembly 620, a second adjustment drive 630, a coating wheel frame 640, and a back roller 650. The first adjustment drive 610 is fixed to the frame 100. The tension roller assembly 620 includes a pulley frame 622 and a plurality of tension rollers 623. The pulley frame 622 is slidably connected to the frame 100 and fixedly connected to the power output end of the first adjustment drive 610, causing the first adjustment drive 610 to drive the pulley frame 622 to slide relative to the frame 100. The plurality of tension rollers 623 are spaced apart and rotatably disposed on the pulley frame 622. In this embodiment, the first adjustment drive 610 is a motor screw and nut assembly. Specifically, the first adjustment drive component 610 includes a first motor 611, a first lead screw 613, and a first nut 615. The first motor 611 is mounted on the frame 100. The drive shaft of the first motor 611 is connected to one end of the first lead screw 613. The other end of the first lead screw 613 is rotatably connected to the frame 100. The first nut 615 is sleeved on the first lead screw 613 and screwed to the first lead screw 613. The first nut 615 is slidably connected to the frame 100. The pulley frame 622 is fixedly connected to the first nut 615. The pulley frame 622 is slidably connected to the first guide rail of the frame 100 through the first slider, so that the pulley frame 622 is slidably connected relative to the frame 100. Furthermore, the first adjustment drive unit 610 also includes a displacement sensor (not shown). The displacement sensor is set along the sliding path of the first nut 615. The displacement sensor is used to detect the displacement of the first nut 615 relative to the frame 100, so as to detect the sliding position of the pulley frame 622 relative to the frame 100 in real time. The displacement sensor is electrically connected to the control terminal of the first motor 611, which improves the displacement accuracy of the first nut 615 relative to the frame 100 and realizes the precise adjustment of the electrode tension.

[0030] Furthermore, the first adjusting drive unit 610 also includes a tension sensor for the adjacent back roller position (not shown). The tension sensor for the adjacent back roller position is electrically connected to the control terminal of the first motor 611, enabling the control terminal of the first motor 611 to drive the first nut 615 to slide relative to the frame 100 in real time based on the signals from the displacement sensor and the tension sensor for the adjacent back roller position, thereby increasing the areal density of the electrode coating. The tension sensor for the adjacent back roller position is a strain gauge tension sensor, and its structure and working principle are existing technologies, which will not be described in detail here.

[0031] like Figure 2 and Figure 3As shown, further, the second adjusting drive member 630 is mounted on the pulley frame 622, the coating wheel frame 640 is slidably connected to the pulley frame 622, and the coating wheel frame 640 is fixedly connected to the power output end of the second adjusting drive member 630. The second adjusting drive member 630 drives the coating frame to slide relative to the pulley frame 622 to adjust the position of the coating frame relative to the pulley frame 622. Since the first adjusting drive member 610 drives the pulley frame 622 to slide relative to the frame 100, the position of the coating frame relative to the frame 100 is better adjusted. The back roller 650 is rotatably connected to the coating wheel frame 640. Because the position of the coating frame relative to the frame 100 is better adjusted, the relative position between the back roller 650 and the main coating roller 710 is better adjusted. In this embodiment, there are two, three, or more than four components. The second adjusting drive member 630 is a motor screw and nut assembly. Specifically, the second adjustment drive component 630 includes a second motor 631, a second lead screw 632, and a second nut 633. The second motor 631 is mounted on the first nut 615. The drive shaft of the second motor 631 is connected to one end of the second lead screw 632. The other end of the second lead screw 632 is rotatably connected to the coating wheel frame 640. The second nut 633 is sleeved on the second lead screw 632 and screwed to the second lead screw 632. The second nut 633 is slidably connected to the pulley frame 622. The coating wheel frame 640 is fixedly connected to the second nut 633, and the coating wheel frame 640 is slidably connected to the second guide rail on the pulley frame 622 via the second slider, so that the coating wheel frame 640 is slidably connected relative to the pulley frame 622.

[0032] Furthermore, the second adjustment drive unit 630 also includes several position sensors (not shown). These position sensors are spaced apart on the pulley frame 622 along the sliding displacement of the second nut 633 relative to the pulley frame 622. Each position sensor is electrically connected to the control terminal of the second motor 631, enabling the second motor 631 to reliably drive the second nut 633 to slide relative to the pulley frame 622 via the second lead screw 632. This improves the displacement accuracy of the second nut 633 relative to the pulley frame 622, thereby precisely adjusting the position of the back roller 650 relative to the main coating roller 710. In this embodiment, the control terminal of the second motor 631 is communicatively connected to the control terminal of the first motor 611, allowing the first motor 611 to drive the first lead screw 613 by combining the drive stroke of the second motor 631, the displacement signal from the displacement sensor, and the electrode tension signal from the adjacent back roller tension sensor, thereby accurately and effectively adjusting the sliding displacement of the first nut 615 relative to the frame 100.

[0033] like Figure 3 and Figure 4As shown, further, the plurality of tension rollers 623 include a first tension roller 6232 and a second tension roller 6233, both of which are rotatably connected to the pulley frame 622. The first tension roller 6232 is disposed adjacent to the main coating roller 710, and the second tension roller 6233 is disposed opposite to the main coating roller 710 and adjacent to the discharge end of the first conveyor roller group 300. In this embodiment, the electrode sheet passes through different positions of the tension roller group 620 of the inter-coating tension adjustment mechanism 600 in the coating state and the rolling state, respectively. Specifically, in the coating state, the electrode unwound by the unwinding mechanism 200 passes sequentially through the first conveyor roller group 300, the second sheet roller 6233, above the first sheet roller 6232, the side of the back roller 650 adjacent to the main coating roller 710, and the second conveyor roller group 500; in the rolling state, the electrode unwound by the unwinding mechanism 200 passes sequentially through the first conveyor roller group 300, the second sheet roller 6233, below the first sheet roller 6232, the side of the main coating roller 710 away from the back roller 650, and the second conveyor roller group 500.

[0034] It is understandable that by adjusting the sliding position of the pulley frame 622 relative to the frame 100 and the sliding position of the coating frame relative to the pulley frame 622, the equipment not only reliably adjusts the relative position between the back roller 650 and the main coating roller 710 during coating, avoiding uneven coating of the electrode sheets, but also, during rolling, adjusts the tension of the electrode sheets by winding them around different positions of the tension roller group 620 of the inter-coating tension adjustment mechanism 600, achieving reliable rolling of the electrode sheets and improving the compatibility of the tension roller group 620. Furthermore, the design of the tension roller group 620 enables rapid adjustment of the electrode sheet tension when adjusting the electrode sheet tension, improving the efficiency and convenience of electrode sheet tension adjustment and preventing tape breakage during the electrode sheet tension adjustment process.

[0035] In one embodiment, the main coating roller pressing mechanism 700 is located above the unwinding mechanism 200. In this embodiment, the roller knife assembly 410 is located above the main coating roller pressing mechanism 700, and the main coating roller pressing mechanism 700 is located between the unwinding mechanism 200 and the roller knife assembly 410, making the overall structure of the equipment more compact.

[0036] like Figure 2 and Figure 3As shown, the roller cutter assembly 410 further includes a roller cutter 412 and two lifting assemblies 414. The two lifting assemblies 414 are arranged opposite to each other on the frame 100. Each lifting assembly 414 includes a lifting drive 4142 and a lifting slide 4144. The lifting drive 4142 is mounted and fixed on the frame 100, and the lifting slide 4144 is slidably connected to the frame 100. The lifting slide 4144 is fixedly connected to the power output shaft of the lifting drive 4142, so that the lifting drive 4142 drives the lifting slide 4144 to slide relative to the frame 100. The two ends of the roller cutter 412 are respectively fixedly connected to the lifting slides 4144 of the two lifting assemblies 414. The roller cutter 412 is arranged parallel to the main coating roller 710. Since the lifting drive 4142 drives the lifting slide 4144 to slide relative to the frame 100, the distance between the roller cutter 412 and the main coating roller 710 can be adjusted better. In this embodiment, the lifting drive component 4142 is a pneumatic cylinder or an electric cylinder.

[0037] like Figure 3 and Figure 4 As shown, in one embodiment, the main coating roller pressing mechanism 700 includes a main coating roller 710, a coating assembly 720, a receiving hopper 730, and a roller pressing assembly 740; the main coating roller 710 is rotatably connected to the frame 100; the coating assembly 720 is disposed on the frame 100, and the driving end of the coating assembly 720 is used to drive the coating die head 722 of the coating assembly 720 to move toward or away from the main coating roller 710; the driving end of the coating assembly 720 is used to... When the equipment is in the coating state, the coating die 722 of the coating assembly 720 is driven to move toward the main coating roller 710, so that the coating die 722 of the coating assembly 720 abuts against the main coating roller 710; when the equipment is in the coating state, the driving end of the coating assembly 720 drives the coating die 722 of the coating assembly 720 to move toward the main coating roller 710, so that the coating die 722 of the coating assembly 720 abuts against the main coating roller 710.

[0038] like Figure 3 and Figure 4As shown, further, the driving end of the coating assembly 720 is used to drive the coating die 722 of the coating assembly 720 to move away from the main coating roller 710 when the equipment is in the rolling state; when the equipment is in the rolling state, the driving end of the coating assembly 720 drives the coating die 722 of the coating assembly 720 to move away from the main coating roller 710, so that there is a fourth gap between the coating die 722 and the main coating roller 710. The receiving hopper 730 is provided on the frame 100, and the receiving port of the receiving hopper 730 is located below the position where the coating die 722 of the coating assembly 720 acts on the main coating roller 710, so as to collect the coating that falls off during the process of the coating die 722 acting on the main coating roller 710. The rolling assembly 740 is mounted on the frame 100. The movable roller 745 of the rolling assembly 740 is used to roll the electrode sheet on the side away from the main coating roller 710 when the equipment is in the rolling state, so as to roll the electrode sheet.

[0039] It should be noted that the structure and working principle of the drive end of the coating component 720 are the same as those of the existing mold head adjustment mechanism, and will not be elaborated further here.

[0040] like Figure 3 and Figure 4 As shown, in one embodiment, the roll forming assembly 740 includes a roll forming drive 741, a telescopic rod seat 743, and a movable roller 745. The roll forming telescopic drive is fixed to the frame 100, and its power output end is connected to one end of the telescopic rod seat 743. The movable roller 745 is rotatably connected to the other end of the telescopic rod seat 743, allowing the movable roller 745 to move closer to or away from the main coating roller 710. In this embodiment, the roll forming drive 741 can be a pneumatic cylinder or an electric cylinder.

[0041] like Figure 3 and Figure 4 As shown, in one embodiment, the roll forming assembly 740 is located below the main coating roll 710, making the structure of the compact coating roll forming equipment 10 more compact.

[0042] like Figure 3 and Figure 4 As shown, in one embodiment, the roller cutter assembly 410 is located above the main coating roll 710. Specifically, the roller pressing assembly 740 is located below the main coating roll 710, the roller cutter assembly 410 is located above the main coating roll 710, the coating die head 722 is located to the left of the main coating roll 710, and the inter-coating tension adjustment mechanism 600 is located to the right of the main coating roll 710, making the structure of the compact coating roller pressing equipment 10 more compact.

[0043] like Figure 3 and Figure 4As shown, in one embodiment, the compact coating roller press 10 further includes a receiving mechanism 800, which is disposed on the frame 100 and adjacent to the first conveyor roller group 300. The receiving mechanism 800 is used to connect the new electrode sheet with the old electrode sheet when the unwinding mechanism 200 switches to unwinding the electrode sheet, so as to start up quickly when switching to unwinding and reduce downtime. In this embodiment, the receiving mechanism 800 includes a receiving rack 810 and two pressing clamping plate assemblies 820. The two pressing clamping plate assemblies 820 are an upper pressing clamping plate assembly 820 and a lower pressing clamping plate assembly 820. The receiving rack 810 is located on the frame 100. The upper pressing clamping plate assembly 820 and the lower pressing clamping plate assembly 820 are arranged side by side on the receiving rack 810. The upper pressing clamping plate assembly 820 is used to clamp the old electrode sheet when the unwinding mechanism 200 switches to unwinding the electrode sheet. The lower pressing clamping plate assembly 820 is used to clamp the new electrode sheet when the unwinding mechanism 200 switches to unwinding the electrode sheet. After the old electrode sheet and the new electrode sheet are connected and fixed, the upper pressing clamping plate assembly 820 releases the old electrode sheet, and the lower pressing clamping plate assembly 820 releases the new electrode sheet, so that the machine can be restarted, reducing equipment downtime. Furthermore, each pressing clamp assembly 820 includes a pressing plate 821, a pressing drive cylinder 822, and a silicone pressing component 823. The pressing plate 821 is fixed to the connecting material rack 810, and the pressing drive cylinder 822 is installed on the connecting material rack 810. The power output end of the pressing drive cylinder 822 is fixedly connected to the silicone pressing component 823 to drive the silicone pressing component 823 to move closer to or away from the pressing plate 821, so that the silicone pressing component 823 presses or releases the electrode sheet on the pressing plate 821, avoiding damage to the electrode sheet by the silicone pressing component 823 and providing a better buffering effect. The connecting material rack 810 is arranged along the conveying direction of the first conveying roller group 300.

[0044] like Figure 3 and Figure 4 As shown, in one embodiment, the first conveyor roller group 300 includes a first conveyor roller 310, an adjusting roller 320, and a second conveyor roller 330 arranged sequentially along the electrode conveying direction. Both the first conveyor roller 310 and the second conveyor roller 330 are rotatably connected to the frame 100. The adjusting roller 320 moves relative to the first conveyor roller 310 and the second conveyor roller 330 respectively when adjusting the electrode tension, so as to keep the electrode tension constant. This ensures that the foil adheres tightly to the back roller 650 during coating to eliminate wrinkles, and that the foil enters the roll gap straight during rolling, achieving uniform compaction. Under the combined action of the adjusting roller 320 and the inter-coating tension adjustment mechanism 600, the equipment can quickly and effectively adjust the electrode tension requirements in both coating and rolling states. In particular, the adjusting roller 320 can effectively respond to real-time adjustment requirements of the electrode tension.

[0045] Furthermore, the adjusting roller 320 includes a sway drive 321, a swing rod 322, and an adjusting wheel 323. The sway drive 321 is mounted on the frame 100. The power output end of the sway drive 321 is rotatably connected to the swing rod 322. One end of the swing rod is rotatably connected to the frame, and the adjusting wheel 323 is rotatably connected to the other end of the swing rod 322. This causes the sway drive 321 to drive the swing rod 322 to oscillate relative to the frame 100. When adjusting the electrode tension, the sway drive 321 drives the swing rod 322 to oscillate relative to the frame 100, thereby changing the position of the adjusting wheel 323 relative to the frame 100 and thus adjusting the electrode tension. In this embodiment, the control end of the sway drive 321 is electrically connected to the control ends of the first motor 611 and the second motor 631, respectively, to adapt the sway position of the swing rod 322 relative to the frame 100 according to the tension requirements of the electrode during coating or rolling, thereby changing the position of the adjusting wheel 323. The adjusting wheel 323 is located between the first conveyor wheel 310 and the second conveyor wheel 330. There are two first conveyor wheels 310, and the receiving mechanism 800 is located between the two first conveyor wheels 310.

[0046] like Figure 3 and Figure 4As shown, the unwinding mechanism 200 further includes an unwinding assembly 210, an adjusting seat assembly 220, and a correction sensor 230. The adjusting seat assembly 220, the correction sensor 230, and the first conveying roller group 300 are arranged sequentially in the electrode conveying direction. The adjusting seat assembly 220 includes a cylinder correction drive 222 and a mounting base 224. The cylinder correction drive 222 is mounted on the frame 100, and the mounting base 224 is slidably connected to the frame 100. The mounting base 224 is connected to the power output end of the cylinder correction drive 222, so that the cylinder correction drive 222 drives the mounting base 224 to slide relative to the frame 100. The unwinding assembly 210 includes an air-expanding roller 212, a first guide roller 213, and a second guide roller 214. The air-expanding roller 212 is rotatably mounted on the mounting base 224, and the first guide rail is rotatably connected to the mounting base 224. The first guide rail is arranged parallel to the air-expanding roller 212. The second guide roller 214 is rotatably mounted on the frame 100, and is arranged parallel to the first guide roller 213. A web-correction sensor 230 is mounted on the frame 100, located between the first guide roller 213 and the second guide roller 214. The web-correction sensor 230 is electrically connected to the control end of the cylinder web-correction drive 222. The web-correction sensor 230 is used to detect whether there is deviation after the electrode sheet is unwound. If there is deviation after unwound, the cylinder web-correction drive 222 is activated to drive the mounting base 224 to slide relative to the frame 100. Specifically, the mounting base 224 slides relative to the frame 100 in a direction parallel to the Y-axis, and is slidably connected to the frame 100 via a slide rail and slider connection. It should be noted that the structure and working principle of the air-expanding roller 212 and the web-correction sensor 230 are existing technologies and will not be elaborated upon here.

[0047] Furthermore, the compact coating roll forming equipment 10 also includes an electrode curing assembly (not shown). The electrode curing assembly is mounted on the frame 100 and is located adjacent to the second conveyor roller group 500. The electrode curing assembly is used to heat and cure the electrode when the equipment is in the coating state, but not to heat and cure the electrode when the equipment is in the roll forming state, thus thermosetting the coated material onto the electrode. Specifically, the structure and working principle of the electrode curing assembly are existing technologies and will not be elaborated upon here. For example, the electrode curing assembly may be a heated roller group.

[0048] See also Figures 1 to 6 This application also provides a control method for a compact coating roll forming machine 10 for electrode sheets, used to control the compact coating roll forming machine 10 described in any of the above embodiments. Further, the control method includes some or all of the following steps: S101, Obtain instruction information for the working mode, including coating instruction information or rolling instruction information. When the instruction information is coating instruction information, the equipment enters the coating working state; when the instruction information is rolling instruction information, the equipment enters the rolling working state.

[0049] S103, determine whether the instruction information is a coating instruction information; if yes, that is, when the instruction information is a coating instruction information, the adjustment drive end of the inter-coating tension adjustment mechanism 600 drives the back roller 650 to move to the position where it abuts against the electrode sheet away from the main coating roller 710, so that the back roller 650 abuts against the main coating roller 710; the drive end of the roller cutter assembly 410 of the die-cutting mechanism 400 drives the roller cutter assembly 410 to move to the position where it abuts against the main coating roller 710, so that the roller cutter assembly 410 abuts against the main coating roller 710; the roller pressing drive end of the main coating roller pressing mechanism 700 drives the moving roller 745 to move to the position where there is the first gap with the main coating roller 710.

[0050] S105, otherwise, when the instruction information is a roll pressing instruction information, the adjusting drive end of the inter-coating tension adjustment mechanism 600 drives the back roller 650 to move to a position where there is a second gap with the main coating roller 710, the drive end of the roller cutter assembly 410 of the die-cutting mechanism 400 drives the roller cutter assembly 410 to move to a position where there is a third gap with the main coating roller 710, and the roll pressing drive end of the main coating roll pressing mechanism 700 drives the moving roller 745 to move to a position where it abuts against the electrode sheet away from the main coating roller 710.

[0051] The control method of the compact coating roller pressing equipment 10 for electrodes described above first obtains the instruction information of the working mode, and then determines whether the instruction information is a coating instruction information; if so, that is, when the equipment is in the coating state, the electrode unwound by the unwinding mechanism 200 passes sequentially through the first conveyor roller group 300, the tension roller group 620 of the inter-coating tension adjustment mechanism 600, the back roller 650, and the second conveyor roller group 500. The main coating roller 710 abuts against the side of the electrode away from the back roller 650, and the roller cutter assembly 410 scrapes the main coating roller 710. At this time, the moving roller 7 of the main coating roller pressing mechanism 700... There is a first gap between the back roller 65 and the main coating roller 710; otherwise, when the equipment is in the rolling state, the electrode unwound by the unwinding mechanism 200 passes sequentially through the first conveyor roller group 300, the tension roller group 620 of the inter-coating tension adjustment mechanism 600, the main coating roller 710 and the second conveyor roller group 500, there is a second gap between the back roller 650 and the main coating roller 710, there is a third gap between the roller cutter assembly 410 and the main coating roller 710, and the moving roller 745 rolls on the side of the electrode away from the main coating roller 710, so that the moving roller 745 and the main coating roller 710 jointly roll the electrode; The aforementioned compact coating and rolling equipment 10 not only coats the electrode sheets but also rolls them, meaning the equipment integrates coating and rolling functions. Furthermore, the first conveyor roller group 300, the inter-coating tension adjustment mechanism 600, and the second conveyor roller group 500 are arranged sequentially along the vertical direction of the frame 100. The unwinding mechanism 200 and the main coating and rolling mechanism 700 are located on the same side of the first conveyor roller group 300, making the overall structure of the equipment more compact and reducing the space occupied by the equipment.

[0052] This application also provides an electrode 20, which is prepared using the compact coating roll forming equipment 10 for electrodes described in any of the above embodiments.

[0053] This application also provides a battery including the aforementioned electrode.

[0054] Compared with the prior art, this disclosure has at least the following advantages: 1) In the above-mentioned compact coating roller pressing equipment 10 for electrodes, when the equipment is in the coating state, the electrodes unwound by the unwinding mechanism 200 pass sequentially through the first conveyor roller group 300, the tension roller group 620 of the inter-coating tension adjustment mechanism 600, the back roller 650, and the second conveyor roller group 500. The main coating roller 710 abuts against the side of the electrode away from the back roller 650, and the roller cutter assembly 410 scrapes the main coating roller 710. At this time, there is a first gap between the moving roller 745 of the main coating pressing mechanism 700 and the main coating roller 710. When the equipment is in the rolling state, the electrode sheet unwound by the unwinding mechanism 200 passes sequentially through the first conveying roller group 300, the tension roller group 620 of the inter-coating tensioning mechanism 600, the main coating roller 710 and the second conveying roller group 500. There is a second gap between the back roller 650 and the main coating roller 710, and there is a third gap between the roller cutter assembly 410 and the main coating roller 710. The moving roller 745 rolls on the side of the electrode sheet away from the main coating roller 710, so that the moving roller 745 and the main coating roller 710 jointly roll the electrode sheet. 2) The above-mentioned compact coating roll forming equipment 10 not only achieves coating of the electrode sheet, but also roll forming of the electrode sheet. That is, the equipment integrates coating and roll forming functions into one. In addition, the first conveyor roller group 300, the inter-coating tension adjustment mechanism 600 and the second conveyor roller group 500 are arranged in sequence along the vertical direction of the frame 100. The unwinding mechanism 200 and the main coating roll forming mechanism 700 are located on the same side of the first conveyor roller group 300, which makes the overall structure of the equipment more compact and the overall space occupied by the equipment smaller.

[0055] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A compact coating roll forming apparatus for electrode sheets, the compact coating roll forming apparatus comprising a frame and an unwinding mechanism, a first conveyor roller group, a die-cutting mechanism, and a second conveyor roller group respectively disposed on the frame, characterized in that, The compact coating roll forming equipment also includes an inter-coating tension adjustment mechanism and a main coating roll forming mechanism respectively disposed on the frame. The first conveyor roller group, the inter-coating tension adjustment mechanism and the second conveyor roller group are arranged sequentially along the vertical direction of the frame. The unwinding mechanism and the main coating roll forming mechanism are located on the same side of the first conveyor roller group. The main coating roll of the main coating roll forming mechanism is disposed adjacent to the back roll of the inter-coating tension adjustment mechanism. The roller cutter assembly of the die-cutting mechanism is disposed adjacent to the main coating roll of the main coating roll forming mechanism. When the equipment is in the coating state, the electrode unwound by the unwinding mechanism passes sequentially through the first conveying roller group, the tension roller group of the inter-coating tensioning mechanism, the back roller and the second conveying roller group. The main coating roller abuts against the side of the electrode away from the back roller. The roller cutter assembly scrapes the main coating roller. There is a first gap between the moving roller of the main coating roller pressing mechanism and the main coating roller. When the equipment is in the rolling state, the electrode sheet unwound by the unwinding mechanism passes sequentially through the first conveying roller group, the tension roller group of the inter-coating tensioning mechanism, the main coating roller and the second conveying roller group. There is a second gap between the back roller and the main coating roller, and there is a third gap between the roller cutter assembly and the main coating roller. The moving roller presses the side of the electrode sheet away from the main coating roller.

2. The compact coating roller press according to claim 1, characterized in that, The main coating roller pressing mechanism is located above the unwinding mechanism.

3. The compact coating roller press according to claim 1, characterized in that, The main coating roller pressing mechanism includes a main coating roller, a coating assembly, a receiving hopper, and a roller pressing assembly; The main coating roll is rotatably connected to the frame; The coating assembly is mounted on the frame. The drive end of the coating assembly is used to drive the coating die head of the coating assembly to move towards or away from the main coating roller. When the equipment is in the coating state, the drive end of the coating assembly is used to drive the coating die head of the coating assembly towards the main coating roller, so that the coating die head of the coating assembly abuts against the main coating roller. When the equipment is in the rolling state, the drive end of the coating assembly is also used to drive the coating die head of the coating assembly away from the main coating roller. The receiving hopper is mounted on the frame, and the receiving port of the receiving hopper is located below the position where the coating die head of the coating assembly acts on the main coating roller. The rolling assembly is mounted on the frame, and the movable roller of the rolling assembly is used to roll the electrode sheet on the side away from the main coating roller when the equipment is in the rolling state.

4. The compact coating roller press according to claim 3, characterized in that, The rolling assembly includes a rolling drive component, a telescopic rod seat, and a movable roller. The rolling telescopic drive component is fixed to the frame, and its power output end is connected to one end of the telescopic rod seat. The movable roller is rotatably connected to the other end of the telescopic rod seat; and / or, The roll forming assembly is located below the main coating roll.

5. The compact coating roller press according to claim 3, characterized in that, The roller cutter assembly is located above the main coating roll.

6. The compact coating roller press according to claim 1, characterized in that, It also includes a receiving mechanism, which is located on the frame and adjacent to the first conveyor roller group. The receiving mechanism is used to connect the new electrode sheet to the old electrode sheet when the unwinding mechanism switches to unwinding the electrode sheet.

7. The compact coating roller press according to claim 1, characterized in that, The inter-coating tension adjustment mechanism includes a first adjustment drive, a tension roller assembly, a second adjustment drive, a coating wheel frame, and a back roller. The first adjustment drive is fixed to the frame. The tension roller assembly includes a pulley frame and several tension rollers. The pulley frame is slidably connected to the frame and fixedly connected to the power output end of the first adjustment drive. The several tension rollers are spaced apart and rotatably arranged on the pulley frame. The second adjustment drive is mounted on the pulley frame. The coating wheel frame is slidably connected to the pulley frame and fixedly connected to the power output end of the second adjustment drive. The back roller is rotatably connected to the coating wheel frame. and / or, The first conveyor roller group includes a first conveyor wheel, an adjusting roller, and a second conveyor wheel arranged sequentially along the electrode conveying direction. The first conveyor wheel and the second conveyor wheel are rotatably connected to the frame. The adjusting roller is used to move relative to the first conveyor wheel and the second conveyor wheel respectively when adjusting the electrode tension.

8. A control method for a compact coating roller pressing device for electrode sheets, characterized in that, The control method for controlling the compact coating roller press equipment according to any one of claims 1 to 7 includes: Obtain instruction information for the working mode, including coating instruction information or rolling instruction information; Determine whether the instruction information is a coating instruction information; if so, the adjustment drive end of the inter-coating tension adjustment mechanism drives the back roller to move to a position where it abuts against the electrode sheet away from the main coating roller, so that the back roller abuts against the main coating roller; the roller cutter assembly drive end of the die-cutting mechanism drives the roller cutter assembly to move to a position where it abuts against the main coating roller, so that the roller cutter assembly abuts against the main coating roller; the roller pressing drive end of the main coating roller pressing mechanism drives the moving roller to move to a position where there is the first gap with the main coating roller. Otherwise, the adjusting drive end of the inter-coating tensioning mechanism drives the back roller to move to a position where there is a second gap with the main coating roller, the roller cutter assembly drive end of the die-cutting mechanism drives the roller cutter assembly to move to a position where there is a third gap with the main coating roller, and the roller pressing drive end of the main coating pressing mechanism drives the moving roller to move to a position where it abuts against the electrode sheet away from the main coating roller.

9. An electrode sheet, characterized in that, It is prepared using the compact coating roll forming equipment for electrodes according to any one of claims 1 to 7.

10. A battery, characterized in that, Includes the electrode sheet as described in claim 9.

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